Safety and Efficacy of ALD518 for Reducing Oral Mucositis in Head and Neck Cancer Subjects

• Safety and tolerability of ALD518, including incidence of adverse events, serious adverse events and clinically significant laboratory abnormalities [ Time Frame: Participants will be followed for the duration of the trial, an expected average of 12 months ] [ Designated as safety issue: Yes ]
• Clinically assessed ulcerative OM (Who Grade ≥ 2) at a cumulative radiation dose of 55 Gy [ Time Frame: The average time of this assessment will be 5-7 weeks after the initiation of RT ] [ Designated as safety issue: No ]

• Secondary efficacy endpoint of OM assessments [ Time Frame: Measured from onset of OM through Week 4 Post-RT ] [ Designated as safety issue: No ]
  Ulcerative (WHO Grade ≥ 2) and severe (WHO Grade ≥ 3) OM at cumulative doses of 35 Gy, 45 Gy, 55 Gy and 65 Gy; Duration of ulcerative and severe OM, Time of onset of ulcerative and severe OM
• Pharmacokinetics of ALD518 in plasma [ Time Frame: Measured at Baseline, Week 2, Week 4, Last Day of RT and Week 4 Post-RT ] [ Designated as safety issue: No ]
• Impact of ALD518 on Patient-reported Outcomes as measured by the OMDQ, FACT-HN, and FACIT-fatigue scale [ Time Frame: Begins at baseline and is measured at least weekly though WEek 4 Post-RT ] [ Designated as safety issue: No ]
• C-reactive protein serum concentrations [ Time Frame: Measured at intervals from Screening visit through Week 4 Post-RT ] [ Designated as safety issue: No ]

The purpose of this study is to evaluate the safety and efficacy of ALD518 in modifying the course of oral mucositis in subjects with head and neck cancer receiving concomitant chemotherapy and radiotherapy

• Biological: ALD518
  IV
• Drug: 0.9% saline
  IV Infusion

• Experimental: Open Label ALD518
  Intervention: Biological: ALD518
• Experimental: ALD518 Dose 1
  Intervention: Biological: ALD518
• Experimental: ALD518 Dose 2
  Intervention: Biological: ALD518
• Placebo Comparator: Placebo
  Intervention: Drug: 0.9% saline

Inclusion Criteria:

• Have recently diagnosed (< than 6 months prior to screening visit date), pathologically confirmed, non-metastatic SCC of the oral cavity, oropharynx, hypopharynx or larynx that will be treated with CRT as first-line treatment; subjects with a history of surgical management (approximately 4-6 weeks before RT with sufficient time for post-surgical healing) are eligible
• Have a plan to receive a continuous course of conventional external beam irradiation delivered by intensity-modulated radiotherapy (IMRT) as single daily fractions of 2.0 to 2.2 Gy, with a cumulative radiation dose between 55 and 72 Gy.
• Have a plan to receive a standard cisplatin CT regimen administered tri-weekly (80 to 100 mg/m2, on Days 0, 21, and 42) or weekly (30 to 40 mg/m2) or a standard carboplatin regimen administered weekly (100 mg/m2)
• Have an Eastern Cooperative Oncology Group (ECOG) performance status ≤ 1
• CRP < 80 mg/L
• Have adequate hematopoietic, hepatic, and renal function at the screening visit

Exclusion Criteria:

• Tumor of the lips, sinuses, salivary glands, nasopharynx or unknown primary tumor
• Metastatic disease (M1) Stage IV C
• Any prior history of head and neck cancer
• Prior radiation to the head and neck
• Have had a major surgical procedure, other than for HNC, or significant traumatic injury within 4 weeks prior to the initiation of RT; or anticipation of need for a major surgical procedure during the clinical trial
• Active infectious disease, excluding oral candidiasis
• Have OM at the screening visit
• Have a history of hypersensitivity to monoclonal antibody